1708 + Interview Questions in Chemistry Page 19 InterviewSolution

901.	Which one is most reactive towards SN1 reaction?
Answer» Which one is most reactive towards SN¹ reaction?

Discussion

902.	Calculate the number of oxalic acid molecules in 100 mL of 0.02 N oxalic acid.
Answer» Calculate the number of oxalic acid molecules in $100 m L$ of $0.02 N$ oxalic acid.

Discussion

903.	Shape of the molecule having dsp2 and d2sp3 hybridisation is respectively:
Answer» Shape of the molecule having ${d s p}^{2}$ and $d^{2}$ ${s p}^{3}$ hybridisation is respectively:

Discussion

904.	The element 23290Th belongs to 4n series which will be the end product of this series:
Answer» The element $_{90}^{232} T h$ belongs to 4n series which will be the end product of this series:

Discussion

905.	1 L of a N2HCl solution is heated in a beaker. It was observed that when the volume of the solution was reduced to 600 mL, 3.25 g of HCl is lost. Calculate the normality of the new solution.
Answer» $1 L$ of a $\frac{N}{2} H C l$ solution is heated in a beaker. It was observed that when the volume of the solution was reduced to $600 mL$ , $3.25 g$ of $H C l$ is lost. Calculate the normality of the new solution.

Discussion

906.	Name of the structure of silicates in which three oxygen atoms of [SiO4]4− are shared -
Answer» Name of the structure of silicates in which three oxygen atoms of $[S i O_{4}]^{4 -}$ are shared -

Discussion

907.	The volume occupied by 7.23×1023 molecules of carbon dioxide and 3.01×1023 molecules of argon by atom at 0∘C and 1 atm pressure is___
Answer» The volume occupied by $7.23 \times 10^{23}$ molecules of carbon dioxide and $3.01 \times 10^{23}$ molecules of argon by atom at $0^{\circ} C$ and $1 atm$ pressure is___

Discussion

908.	Which of the following can be used to measure pH?
Answer» Which of the following can be used to measure pH?

Discussion

909.	Arrange the following compounds in order of increasing dipole moment I. Toluene II. m-dichlorobenzene III. o-dichlorobenzene IV. p-dichlorobenzene
Answer» Arrange the following compounds in order of increasing dipole moment I. Toluene II. m-dichlorobenzene III. o-dichlorobenzene IV. p-dichlorobenzene

Discussion

910.	The first ionization energies of alkaline earth metals are higher than those of the alkali metals. This is because ...
Answer» The first ionization energies of alkaline earth metals are higher than those of the alkali metals. This is because ...

Discussion

911.	Sample of 2, 3-dibromo-3-methylpentane is heated with zinc dust. The resulting product is isolated and heated with HI in the presence of phosphorus. Indicate which is the structure that represent the final organic product formed in the reaction
Answer» Sample of 2, 3-dibromo-3-methylpentane is heated with zinc dust. The resulting product is isolated and heated with HI in the presence of phosphorus. Indicate which is the structure that represent the final organic product formed in the reaction

Discussion

912.	Among the following,which hydride has less density than its parent metal?
Answer» Among the following,which hydride has less density than its parent metal?

Discussion

913.	3KClO3+3H2SO4→3KHSO4+HClO4+2ClO2+H2OIf molecular weight of KClO3 is M, then equivalent weight of KClO3 is:
Answer» $3 K C l O_{3} + 3 H_{2} S O_{4} \to 3 K H S O_{4} + H C l O_{4} + 2 C l O_{2} + H_{2} O$ If molecular weight of $K C l O_{3}$ is $M$ , then equivalent weight of $K C l O_{3}$ is:

Discussion

914.	Na2CO3 does not decompose on heating where as CaCO3 decomposes. Why?
Answer» $N a_{2} C O_{3}$ does not decompose on heating where as $C a C O_{3}$ decomposes. Why?

Discussion

915.	Convert the following condensed structures into Bond-line structure.CH3CONHCH2OCH3
Answer» Convert the following condensed structures into Bond-line structure. $C H_{3} C O N H C H_{2} O C H_{3}$

Discussion

916.	The temporary hardness of water due to calcium bicarbonate can be removed by adding:
Answer» The temporary hardness of water due to calcium bicarbonate can be removed by adding:

Discussion

917.	The work function of metal is 4 eV. To emit a photo electron of zero velocity from the surface of metal, the wavelength of incident light should be:
Answer» The work function of metal is $4 eV$ . To emit a photo electron of zero velocity from the surface of metal, the wavelength of incident light should be:

Discussion

918.	The ionization energy of nitrogen is more than that of oxygen because
Answer» The ionization energy of nitrogen is more than that of oxygen because

Discussion

919.	Barbituric acid and its derivatives are well known as
Answer» Barbituric acid and its derivatives are well known as

Discussion

920.	Which of the following compounds do not follow Law of definite proportion?
Answer» Which of the following compounds do not follow Law of definite proportion?

Discussion

921.	Which of the following is not related to the extraction of Aluminium?
Answer» Which of the following is not related to the extraction of Aluminium?

Discussion

922.	Halogenation of alkanes is an example of
Answer» Halogenation of alkanes is an example of

Discussion

923.	Knowing that Na+>Mg2+ and S2−>Cl−, predict which compound will be the least soluble in a polar solvent?
Answer» Knowing that $N a + > M g^{2 +}$ and $S^{2 -} > C l^{-}$ , predict which compound will be the least soluble in a polar solvent?

Discussion

924.	A large number of oxyacids of Sulphur are known. Those oxyacids with S-S linkages are in general referred to as __ acids.
Answer» A large number of oxyacids of Sulphur are known. Those oxyacids with S-S linkages are in general referred to as __ acids.

Discussion

925.	Highly pure dilute solution of sodium in liquid ammonia
Answer» Highly pure dilute solution of sodium in liquid ammonia

Discussion

926.	Which of the following d orbitals cannot be used to form bonds in SO3 ?
Answer» Which of the following d orbitals cannot be used to form bonds in $S O_{3}$ ?

Discussion

927.	For a given exothermic reaction, Kp and K′p are the equilibrium constants at temperatures T1 and T2 respectively. Assuming that heat of reaction is constant in temperatures range between T1 and T2. It is readily observation that :(Given, T2>T1)
Answer» For a given exothermic reaction, $K_{p}$ and $K_{p}^{'}$ are the equilibrium constants at temperatures $T_{1}$ and $T_{2}$ respectively. Assuming that heat of reaction is constant in temperatures range between $T_{1}$ and $T_{2}$ . It is readily observation that : (Given, $T_{2} > T_{1}$ )

Discussion

928.	Ammonium dichromate is used in fire works. The green coloured powder obtained is:
Answer» Ammonium dichromate is used in fire works. The green coloured powder obtained is:

Discussion

929.	Identify the correct order of acidic strength of CO2, CuO, CaO, and H2O:
Answer» Identify the correct order of acidic strength of $C O_{2}$ , $C u O$ , $C a O$ , and $H_{2} O$ :

Discussion

930.	A certain dye absorbs 4700 ∘A and fluoresces at 5080 ∘A, these are being wavelengths of maximum absorption that under given conditions 47% of the absorbed energy is emitted. Calculate the ratio of the number of quanta emitted to the number of quanta absorbed.
Answer» A certain dye absorbs $4700 \circ A$ and fluoresces at $5080 \circ A$ , these are being wavelengths of maximum absorption that under given conditions 47% of the absorbed energy is emitted. Calculate the ratio of the number of quanta emitted to the number of quanta absorbed.

Discussion

931.	Which of the following carbanions is the most stable?
Answer» Which of the following carbanions is the most stable?

Discussion

932.	Consider a weak monobasic acid HA having a concentration C with degree of dissociation, α<<1.. The pH of this weak acid in terms of acid dissociation constant Ka and concentration C is :
Answer» Consider a weak monobasic acid $H A$ having a concentration C with degree of dissociation, $α << 1.$ . The pH of this weak acid in terms of acid dissociation constant $K_{a}$ and concentration $C$ is :

Discussion

933.	The chlorobenzene can be converted into benzene by reduction with nascent hydrogen produced by an alloy(metallic) in the presence of alkali, the metallic alloy used is
Answer» The chlorobenzene can be converted into benzene by reduction with nascent hydrogen produced by an alloy(metallic) in the presence of alkali, the metallic alloy used is

Discussion

934.	The correct structure of tribromooctaoxide is:
Answer» The correct structure of tribromooctaoxide is:

Discussion

935.	Structural units of ice and dry ice are, respectively.
Answer» Structural units of ice and dry ice are, respectively.

Discussion

936.	The product B is:
Answer» The product B is:

Discussion

937.	The compound(s) which show tautomerism is/are :
Answer» The compound(s) which show tautomerism is/are :

Discussion

938.	When I was eating chips, I noticed there very fine grains of spices on its surface. I tried to shake it off, but they weren't that easy to get rid of.I wondered whether this is a case of adsorption. I'm such a nerd huh.What do you think?
Answer» When I was eating chips, I noticed there very fine grains of spices on its surface. I tried to shake it off, but they weren't that easy to get rid of. I wondered whether this is a case of adsorption. I'm such a nerd huh. What do you think?

938.

When I was eating chips, I noticed there very fine grains of spices on its surface. I tried to shake it off, but they weren't that easy to get rid of.I wondered whether this is a case of adsorption. I'm such a nerd huh.What do you think?

Answer»

When I was eating chips, I noticed there very fine grains of spices on its surface. I tried to shake it off, but they weren't that easy to get rid of.

I wondered whether this is a case of adsorption. I'm such a nerd huh.

What do you think?

Discussion

939.	For the given reaction :Number of possible monobromo products (excluding stereoisomers) are :
Answer» For the given reaction : Number of possible monobromo products (excluding stereoisomers) are :

Discussion

940.	Which compound has a planar structure?
Answer» Which compound has a planar structure?

Discussion

941.	The hybridization state of the central oxygen atom in diethyl ether is:
Answer» The hybridization state of the central oxygen atom in diethyl ether is:

Discussion

942.	Zone refining is also known as fractional __
Answer» Zone refining is also known as fractional __

Discussion

943.	Which of the following intermediates have the complete octet around the carbon atom?
Answer» Which of the following intermediates have the complete octet around the carbon atom?

Discussion

944.	1-bromo-3-chlorocyclobutane when treated with two equivalents Na, in the presence of ether, which of the following will be formed?
Answer» 1-bromo-3-chlorocyclobutane when treated with two equivalents Na, in the presence of ether, which of the following will be formed?

Discussion

945.	In which compound, oxidation state of nitrogen is 1
Answer» In which compound, oxidation state of nitrogen is 1

945.

In which compound, oxidation state of nitrogen is 1

Answer»

In which compound, oxidation state of nitrogen is 1

Discussion

946.	The Lewis structure of CO2−3 ion is:
Answer» The Lewis structure of $C O_{3}^{2 -}$ ion is:

Discussion

947.	Identify reactant (X) in the given reaction sequence. CH3COCH3+X→(CH3)3C−OMgClH2O−−→(CH3)3C−OH+Mg(OH)Cl
Answer» Identify reactant (X) in the given reaction sequence. $C H_{3} C O C H_{3} + X \to (C H_{3})_{3} C - O M g C l H_{2} O - - \to (C H_{3})_{3} C - O H + M g (O H) C l$

Discussion

948.	Alkenes could be synthesized by:
Answer» Alkenes could be synthesized by:

Discussion

949.	The complementary strand for the following single strand of DNA is:5′←A−T−G−C−T→3′
Answer» The complementary strand for the following single strand of DNA is: $5^{'} \leftarrow A - T - G - C - T \to 3^{'}$

Discussion

950.	Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?
Answer» Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?

Discussion

Explore topic-wise InterviewSolutions in .

Which one is most reactive towards SN1 reaction?

Calculate the number of oxalic acid molecules in 100 mL of 0.02 N oxalic acid.

Shape of the molecule having dsp2 and d2sp3 hybridisation is respectively:

The element 23290Th belongs to 4n series which will be the end product of this series:

1 L of a N2HCl solution is heated in a beaker. It was observed that when the volume of the solution was reduced to 600 mL, 3.25 g of HCl is lost. Calculate the normality of the new solution.

Name of the structure of silicates in which three oxygen atoms of [SiO4]4− are shared -

The volume occupied by 7.23×1023 molecules of carbon dioxide and 3.01×1023 molecules of argon by atom at 0∘C and 1 atm pressure is___

Which of the following can be used to measure pH?

Arrange the following compounds in order of increasing dipole moment I. Toluene II. m-dichlorobenzene III. o-dichlorobenzene IV. p-dichlorobenzene

The first ionization energies of alkaline earth metals are higher than those of the alkali metals. This is because ...

Sample of 2, 3-dibromo-3-methylpentane is heated with zinc dust. The resulting product is isolated and heated with HI in the presence of phosphorus. Indicate which is the structure that represent the final organic product formed in the reaction

Among the following,which hydride has less density than its parent metal?

3KClO3+3H2SO4→3KHSO4+HClO4+2ClO2+H2OIf molecular weight of KClO3 is M, then equivalent weight of KClO3 is:

Na2CO3 does not decompose on heating where as CaCO3 decomposes. Why?

Convert the following condensed structures into Bond-line structure.CH3CONHCH2OCH3

The temporary hardness of water due to calcium bicarbonate can be removed by adding:

The work function of metal is 4 eV. To emit a photo electron of zero velocity from the surface of metal, the wavelength of incident light should be:

The ionization energy of nitrogen is more than that of oxygen because

Barbituric acid and its derivatives are well known as

Which of the following compounds do not follow Law of definite proportion?

Which of the following is not related to the extraction of Aluminium?

Halogenation of alkanes is an example of

Knowing that Na+&gt;Mg2+ and S2−&gt;Cl−, predict which compound will be the least soluble in a polar solvent?

A large number of oxyacids of Sulphur are known. Those oxyacids with S-S linkages are in general referred to as __ acids.

Highly pure dilute solution of sodium in liquid ammonia

Which of the following d orbitals cannot be used to form bonds in SO3 ?

For a given exothermic reaction, Kp and K′p are the equilibrium constants at temperatures T1 and T2 respectively. Assuming that heat of reaction is constant in temperatures range between T1 and T2. It is readily observation that :(Given, T2&gt;T1)

Ammonium dichromate is used in fire works. The green coloured powder obtained is:

Identify the correct order of acidic strength of CO2, CuO, CaO, and H2O:

A certain dye absorbs 4700 ∘A and fluoresces at 5080 ∘A, these are being wavelengths of maximum absorption that under given conditions 47% of the absorbed energy is emitted. Calculate the ratio of the number of quanta emitted to the number of quanta absorbed.

Which of the following carbanions is the most stable?

Consider a weak monobasic acid HA having a concentration C with degree of dissociation, α&lt;&lt;1.. The pH of this weak acid in terms of acid dissociation constant Ka and concentration C is :

The chlorobenzene can be converted into benzene by reduction with nascent hydrogen produced by an alloy(metallic) in the presence of alkali, the metallic alloy used is

The correct structure of tribromooctaoxide is:

Structural units of ice and dry ice are, respectively.

The product B is:

The compound(s) which show tautomerism is/are :

When I was eating chips, I noticed there very fine grains of spices on its surface. I tried to shake it off, but they weren't that easy to get rid of.I wondered whether this is a case of adsorption. I'm such a nerd huh.What do you think?

For the given reaction :Number of possible monobromo products (excluding stereoisomers) are :

Which compound has a planar structure?

The hybridization state of the central oxygen atom in diethyl ether is:

Zone refining is also known as fractional __

Which of the following intermediates have the complete octet around the carbon atom?

1-bromo-3-chlorocyclobutane when treated with two equivalents Na, in the presence of ether, which of the following will be formed?

In which compound, oxidation state of nitrogen is 1

The Lewis structure of CO2−3 ion is:

Identify reactant (X) in the given reaction sequence. CH3COCH3+X→(CH3)3C−OMgClH2O−−→(CH3)3C−OH+Mg(OH)Cl

Alkenes could be synthesized by:

The complementary strand for the following single strand of DNA is:5′←A−T−G−C−T→3′

Some oxidation reactions of methane are given below. Which of them is/are controlled oxidation reactions?

Knowing that Na+>Mg2+ and S2−>Cl−, predict which compound will be the least soluble in a polar solvent?

For a given exothermic reaction, Kp and K′p are the equilibrium constants at temperatures T1 and T2 respectively. Assuming that heat of reaction is constant in temperatures range between T1 and T2. It is readily observation that :(Given, T2>T1)

Consider a weak monobasic acid HA having a concentration C with degree of dissociation, α<<1.. The pH of this weak acid in terms of acid dissociation constant Ka and concentration C is :